Dragorugio's changes ended up being on both extreme ends. It had simultaneously been greatly buffed and greatly nerfed.
The situation surrounding the evolvable set had always been complex. The system hadn't been able to Rank it properly because of how it had been created.
At the time, Draco had been making multiple sets of equipment that ended up being Semi-Epic items, and such items still had stats like all Common, Uncommon and Rare items. Only true Epic and above items ruled out the need for stats thanks to their active and passive skills.
As such, it still had stats and only two basic effects. However, the issue was that one of the Semi-Epic sets had been infused with a hefty amount of Sacred Force and Source Origin of a Divine Dragon, courtesy of the Dragon Soul.
As such, it mutated and started to possess fraudulent stats for its Rank. It had been granting Draco maximal Fire Mastery, a boosted attack, as well as defense.